J/A+A/688/A25ivo://CDS.VizieR/J/A+A/688/A25doi:10.26093/cds/vizier.36880025CDSSkarka M.Henzl Z.2024-11-29T20:04:58Z2024-07-30T10:38:04ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frvariable-starsf-starsOur primary objective is to accurately identify and classify the variability of A-F stars in the southern continuous viewing zone of the TESS satellite. The brightness limit was set to 10 mag to ensure the utmost reliability of our results and allow for spectroscopic follow-up observations using small telescopes. We aim to compare our findings with existing catalogues of variable stars. The light curves from TESS and their Fourier transform were used to manually classify stars in our sample. Cross-matching with other catalogues was performed to identify contaminants and false positives We have identified 1171 variable stars (51% of the sample). Among these variable stars, 67% have clear classifications, which includes {delta} Sct and {gamma} Dor pulsating stars and their hybrids, rotationally variables, and eclipsing binaries. We have provided examples of the typical representatives of variable stars and discussed the ambiguous cases. We found 20 pairs of stars with the same frequencies and identified the correct source of the variations. Additionally, we found that the variations in 12 other stars are caused by the contamination with the light of faint nearby large-amplitude variable stars. To compare our sample with other variable star catalogues, we have defined two parameters reflecting the agreement in identification of variable stars and their classification. This comparison reveals intriguing disagreements in classification ranging from 52% to 100 %. However, if we assume that stars without specific types are only marked as variable, then the agreement is relatively good, ranging from 57% to 85% (disagreement 15-43%). We have demonstrated that the TESS classification is superior to the classification based on other photometric surveys. The classification of stellar variability is complex and requires careful consideration. Caution should be exercised when using catalogue classifications.2024A&A...688A..25Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/688/A25CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)IV/39 : TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/688/A25https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/688/A25http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/688/A25https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/688/A25https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/688/A25http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/688/A25GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/688/A25/table4 (Classification of A-F spectral type stars in the southern TESS viewing zone)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/688/A25/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/688/A25/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/688/A25/table4?GETtext/xml+votable180.050000true60.18200711008-71.166798090430.0055555555555555564/2066 2069 2112-2113 2117 2339 2345 2348 2434-2435 5/8211-8212 8214 8217 8221 8244-8245 8257 8259-8261 8263 8268-8269 8271-8273 8275 8280-8282 8285-8288 8290 8292 8295 8304 8306-8308 8310 8456-8457 8460 8462 8464-8466 8473-8474 8476 8480 8482 8512 9251 9254-9257 9259-9262 9272 9274-9275 9344 9347 9350-9351 9353-9355 9360-9361 9363 9366 9368 9370-9372 9374 9377-9379 9385 9387-9390 9396 9398 9401-9403 9728-9729 9731-9733 9735 9744-9746 9752 9760-9762 9764-9766 9769-9772 9856 6/32837-32839 32853-32855 32861-32863 32876-32878 32880-32882 32888-32889 32891 32894-32895 32965 32985 32987 32989 32991 33013 33024-33025 33027 33032-33033 33035 33048-33049 33080-33082 33097-33099 33132 33134-33135 33137-33138 33156-33158 33166 33173-33176 33178-33179 33184-33185 33188-33189 33191 33202 33206 33220 33222 33236-33238 33244-33246 33248-33249 33251-33253 33255 33264-33265 33267-33269 33832-33834 33837-33839 33844 33846-33847 33852-33854 33868 33870-33871 33888 33890-33891 33900-33901 33924-33925 33927 33932-33934 33938-33942 33945 33952 34052 34056 37001-37003 37010 37032-37033 37035 37052 37054-37055 37066-37067 37094 37114 37381-37385 37387 37393-37395 37397-37399 37408-37409 37411 37448-37450 37456 37458-37459 37476 37478-37479 37500 37505-37507 37536-37537 37544-37545 37547 37565-37567 37588 37601-37603 37616-37618 37624 38921-38923 38937-38939 38988-38990 38992 39012 39016-39017 39052-39053 39055 39068-39070 39073-39074 39092 39096 39104 39106 39428 39432-39434https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/688/A25?format=asciidefaultJ/A+A/688/A25/table4Classification of A-F spectral type stars in the southern TESS viewing zoneSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNumber in the TIC cataloguemeta.id;meta.mainlongRAJ2000Right ascension (J2000) (1)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (1)degpos.eq.dec;meta.mainCR? Contamination ratio (2)meta.numberfloatnullableBlendsNumber of blending stars with brightness difference less than 5magmeta.numberintTypeVariability typemeta.notecharVmagBrightness in V (1)magphot.mag;em.opt.VfloatTeffEffective temperature (1)Kphys.temperature.effectiveintLum? Luminosity (1)solLumphys.luminosityfloatnullable